The high number of diagnostic methods for images (ultrasound, computer tomography--CT, magnetic nuclear resonance--MNR) has allowed the urologist diagnosis more precocious of renal masses contributing to increase the survival rate and quality of life of patients affected by renal carcinoma. Although many are the advantages that the ultrasound scan gives to the urologist, still today in presence of ultrasound scan results showing expansive renal masses, probably malignant, many perform a CT or MNR for diagnostic confirmation and tumor extension.